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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">rft_generic</span><span data-if="c" style="display:none;">rft_generic</span><span data-if="cpp" style="display:none;">RftGeneric</span><span data-if="dotnet" style="display:none;">RftGeneric</span><span data-if="python" style="display:none;">rft_generic</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">rft_generic</span><span data-if="c" style="display:none;">rft_generic</span><span data-if="cpp" style="display:none;">RftGeneric</span><span data-if="dotnet" style="display:none;">RftGeneric</span><span data-if="python" style="display:none;">rft_generic</span></code> — Compute the real-valued fast Fourier transform of an image.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>rft_generic</b>(<a href="#Image"><i>Image</i></a> : <a href="#ImageFFT"><i>ImageFFT</i></a> : <a href="#Direction"><i>Direction</i></a>, <a href="#Norm"><i>Norm</i></a>, <a href="#ResultType"><i>ResultType</i></a>, <a href="#Width"><i>Width</i></a> : )</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>rft_generic</b>(const Hobject <a href="#Image"><i>Image</i></a>, Hobject* <a href="#ImageFFT"><i>ImageFFT</i></a>, const char* <a href="#Direction"><i>Direction</i></a>, const char* <a href="#Norm"><i>Norm</i></a>, const char* <a href="#ResultType"><i>ResultType</i></a>, const Hlong <a href="#Width"><i>Width</i></a>)</code></p>
<p>
<code>Herror <b>T_rft_generic</b>(const Hobject <a href="#Image"><i>Image</i></a>, Hobject* <a href="#ImageFFT"><i>ImageFFT</i></a>, const Htuple <a href="#Direction"><i>Direction</i></a>, const Htuple <a href="#Norm"><i>Norm</i></a>, const Htuple <a href="#ResultType"><i>ResultType</i></a>, const Htuple <a href="#Width"><i>Width</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>RftGeneric</b>(const HObject&amp; <a href="#Image"><i>Image</i></a>, HObject* <a href="#ImageFFT"><i>ImageFFT</i></a>, const HTuple&amp; <a href="#Direction"><i>Direction</i></a>, const HTuple&amp; <a href="#Norm"><i>Norm</i></a>, const HTuple&amp; <a href="#ResultType"><i>ResultType</i></a>, const HTuple&amp; <a href="#Width"><i>Width</i></a>)</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>::<b>RftGeneric</b>(const HString&amp; <a href="#Direction"><i>Direction</i></a>, const HString&amp; <a href="#Norm"><i>Norm</i></a>, const HString&amp; <a href="#ResultType"><i>ResultType</i></a>, Hlong <a href="#Width"><i>Width</i></a>) const</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>::<b>RftGeneric</b>(const char* <a href="#Direction"><i>Direction</i></a>, const char* <a href="#Norm"><i>Norm</i></a>, const char* <a href="#ResultType"><i>ResultType</i></a>, Hlong <a href="#Width"><i>Width</i></a>) const</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>::<b>RftGeneric</b>(const wchar_t* <a href="#Direction"><i>Direction</i></a>, const wchar_t* <a href="#Norm"><i>Norm</i></a>, const wchar_t* <a href="#ResultType"><i>ResultType</i></a>, Hlong <a href="#Width"><i>Width</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
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<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>RftGeneric</b>(<a href="HObject.html">HObject</a> <a href="#Image"><i>image</i></a>, out <a href="HObject.html">HObject</a> <a href="#ImageFFT"><i>imageFFT</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Direction"><i>direction</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Norm"><i>norm</i></a>, <a href="HTuple.html">HTuple</a> <a href="#ResultType"><i>resultType</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Width"><i>width</i></a>)</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>.<b>RftGeneric</b>(string <a href="#Direction"><i>direction</i></a>, string <a href="#Norm"><i>norm</i></a>, string <a href="#ResultType"><i>resultType</i></a>, int <a href="#Width"><i>width</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>rft_generic</b>(<a href="#Image"><i>image</i></a>: HObject, <a href="#Direction"><i>direction</i></a>: str, <a href="#Norm"><i>norm</i></a>: str, <a href="#ResultType"><i>result_type</i></a>: str, <a href="#Width"><i>width</i></a>: int) -&gt; HObject</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">rft_generic</span><span data-if="c" style="display:none">rft_generic</span><span data-if="cpp" style="display:none">RftGeneric</span><span data-if="com" style="display:none">RftGeneric</span><span data-if="dotnet" style="display:none">RftGeneric</span><span data-if="python" style="display:none">rft_generic</span></code> computes the fast Fourier transform of the input
image <a href="#Image"><i><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></i></a>.  In contrast to <a href="fft_generic.html"><code><span data-if="hdevelop" style="display:inline">fft_generic</span><span data-if="c" style="display:none">fft_generic</span><span data-if="cpp" style="display:none">FftGeneric</span><span data-if="com" style="display:none">FftGeneric</span><span data-if="dotnet" style="display:none">FftGeneric</span><span data-if="python" style="display:none">fft_generic</span></code></a>,
<a href="fft_image.html"><code><span data-if="hdevelop" style="display:inline">fft_image</span><span data-if="c" style="display:none">fft_image</span><span data-if="cpp" style="display:none">FftImage</span><span data-if="com" style="display:none">FftImage</span><span data-if="dotnet" style="display:none">FftImage</span><span data-if="python" style="display:none">fft_image</span></code></a>, and <a href="fft_image_inv.html"><code><span data-if="hdevelop" style="display:inline">fft_image_inv</span><span data-if="c" style="display:none">fft_image_inv</span><span data-if="cpp" style="display:none">FftImageInv</span><span data-if="com" style="display:none">FftImageInv</span><span data-if="dotnet" style="display:none">FftImageInv</span><span data-if="python" style="display:none">fft_image_inv</span></code></a>, the fact that the
input image in the forward transform is a real-valued image (i.e.,
not a complex image) is used.  In this case, the complex output
image has a redundancy.  The values in the right half of the image
are the complex conjugates of the corresponding values in the left
half of the image.  Consequently, runtime and memory can be saved by
only computing and storing the left half of the complex image.
</p>
<p>The parameter <a href="#ResultType"><i><code><span data-if="hdevelop" style="display:inline">ResultType</span><span data-if="c" style="display:none">ResultType</span><span data-if="cpp" style="display:none">ResultType</span><span data-if="com" style="display:none">ResultType</span><span data-if="dotnet" style="display:none">resultType</span><span data-if="python" style="display:none">result_type</span></code></i></a> can be used to specify the result
image type of the reverse transform (<a href="#Direction"><i><code><span data-if="hdevelop" style="display:inline">Direction</span><span data-if="c" style="display:none">Direction</span><span data-if="cpp" style="display:none">Direction</span><span data-if="com" style="display:none">Direction</span><span data-if="dotnet" style="display:none">direction</span><span data-if="python" style="display:none">direction</span></code></i></a> =
<i><span data-if="hdevelop" style="display:inline">'from_freq'</span><span data-if="c" style="display:none">"from_freq"</span><span data-if="cpp" style="display:none">"from_freq"</span><span data-if="com" style="display:none">"from_freq"</span><span data-if="dotnet" style="display:none">"from_freq"</span><span data-if="python" style="display:none">"from_freq"</span></i>).  In the forward transform (<a href="#Direction"><i><code><span data-if="hdevelop" style="display:inline">Direction</span><span data-if="c" style="display:none">Direction</span><span data-if="cpp" style="display:none">Direction</span><span data-if="com" style="display:none">Direction</span><span data-if="dotnet" style="display:none">direction</span><span data-if="python" style="display:none">direction</span></code></i></a>
= <i><span data-if="hdevelop" style="display:inline">'to_freq'</span><span data-if="c" style="display:none">"to_freq"</span><span data-if="cpp" style="display:none">"to_freq"</span><span data-if="com" style="display:none">"to_freq"</span><span data-if="dotnet" style="display:none">"to_freq"</span><span data-if="python" style="display:none">"to_freq"</span></i>), <a href="#ResultType"><i><code><span data-if="hdevelop" style="display:inline">ResultType</span><span data-if="c" style="display:none">ResultType</span><span data-if="cpp" style="display:none">ResultType</span><span data-if="com" style="display:none">ResultType</span><span data-if="dotnet" style="display:none">resultType</span><span data-if="python" style="display:none">result_type</span></code></i></a> must be set to
<i><span data-if="hdevelop" style="display:inline">'complex'</span><span data-if="c" style="display:none">"complex"</span><span data-if="cpp" style="display:none">"complex"</span><span data-if="com" style="display:none">"complex"</span><span data-if="dotnet" style="display:none">"complex"</span><span data-if="python" style="display:none">"complex"</span></i>.
</p>
<p>The parameter direction determines whether the transform should be
performed to the frequency domain or back into the spatial domain.
For <a href="#Direction"><i><code><span data-if="hdevelop" style="display:inline">Direction</span><span data-if="c" style="display:none">Direction</span><span data-if="cpp" style="display:none">Direction</span><span data-if="com" style="display:none">Direction</span><span data-if="dotnet" style="display:none">direction</span><span data-if="python" style="display:none">direction</span></code></i></a> = <i><span data-if="hdevelop" style="display:inline">'to_freq'</span><span data-if="c" style="display:none">"to_freq"</span><span data-if="cpp" style="display:none">"to_freq"</span><span data-if="com" style="display:none">"to_freq"</span><span data-if="dotnet" style="display:none">"to_freq"</span><span data-if="python" style="display:none">"to_freq"</span></i> the input image must
have a real-valued type, i.e., a complex image may not be used as
input.  All image types that can be converted into an image of type
real are supported.  In this case, the output is a complex image of
dimension (w/2+1)*h, where w and h are
the width and height of the input image.  In this mode, the exponent
-1 is used in the transform (see <a href="fft_generic.html"><code><span data-if="hdevelop" style="display:inline">fft_generic</span><span data-if="c" style="display:none">fft_generic</span><span data-if="cpp" style="display:none">FftGeneric</span><span data-if="com" style="display:none">FftGeneric</span><span data-if="dotnet" style="display:none">FftGeneric</span><span data-if="python" style="display:none">fft_generic</span></code></a>).  For
<a href="#Direction"><i><code><span data-if="hdevelop" style="display:inline">Direction</span><span data-if="c" style="display:none">Direction</span><span data-if="cpp" style="display:none">Direction</span><span data-if="com" style="display:none">Direction</span><span data-if="dotnet" style="display:none">direction</span><span data-if="python" style="display:none">direction</span></code></i></a> = <i><span data-if="hdevelop" style="display:inline">'from_freq'</span><span data-if="c" style="display:none">"from_freq"</span><span data-if="cpp" style="display:none">"from_freq"</span><span data-if="com" style="display:none">"from_freq"</span><span data-if="dotnet" style="display:none">"from_freq"</span><span data-if="python" style="display:none">"from_freq"</span></i>, the input image must be
complex.  In this case, the size of the input image is insufficient
to determine the size of the output image.  This must be done by
setting <a href="#Width"><i><code><span data-if="hdevelop" style="display:inline">Width</span><span data-if="c" style="display:none">Width</span><span data-if="cpp" style="display:none">Width</span><span data-if="com" style="display:none">Width</span><span data-if="dotnet" style="display:none">width</span><span data-if="python" style="display:none">width</span></code></i></a> to a valid value, i.e., to 2*w-2
or 2*w-1, where w is the width of the complex image.
In this mode, the exponent 1 is used in the transform.
</p>
<p>The normalizing factor can be set with <a href="#Norm"><i><code><span data-if="hdevelop" style="display:inline">Norm</span><span data-if="c" style="display:none">Norm</span><span data-if="cpp" style="display:none">Norm</span><span data-if="com" style="display:none">Norm</span><span data-if="dotnet" style="display:none">norm</span><span data-if="python" style="display:none">norm</span></code></i></a>, and can take
on the values <i><span data-if="hdevelop" style="display:inline">'none'</span><span data-if="c" style="display:none">"none"</span><span data-if="cpp" style="display:none">"none"</span><span data-if="com" style="display:none">"none"</span><span data-if="dotnet" style="display:none">"none"</span><span data-if="python" style="display:none">"none"</span></i>, <i><span data-if="hdevelop" style="display:inline">'sqrt'</span><span data-if="c" style="display:none">"sqrt"</span><span data-if="cpp" style="display:none">"sqrt"</span><span data-if="com" style="display:none">"sqrt"</span><span data-if="dotnet" style="display:none">"sqrt"</span><span data-if="python" style="display:none">"sqrt"</span></i> and <i><span data-if="hdevelop" style="display:inline">'n'</span><span data-if="c" style="display:none">"n"</span><span data-if="cpp" style="display:none">"n"</span><span data-if="com" style="display:none">"n"</span><span data-if="dotnet" style="display:none">"n"</span><span data-if="python" style="display:none">"n"</span></i>.
The user must ensure the consistent use of the parameters.  This
means that the normalizing factors used for the forward and backward
transform must yield w*h when multiplied.</p>
<h2 id="sec_attention">注意</h2>
<p>The transformation is always performed for the entire image, i.e., the
domain of the image is ignored.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  
    <li>在元组级别自动并行化。</li>
    <li>在图像通道级别自动并行化。</li>
    <li>Automatically parallelized on internal data level.</li>
  
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Image" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></b> (input_object)  </span><span>(multichannel-)image(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject</span> (byte / direction / cyclic / int1 / int2 / uint2 / int4 / real / complex)</span>
</div>
<p class="pardesc">Input image.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="ImageFFT" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ImageFFT</span><span data-if="c" style="display:none">ImageFFT</span><span data-if="cpp" style="display:none">ImageFFT</span><span data-if="com" style="display:none">ImageFFT</span><span data-if="dotnet" style="display:none">imageFFT</span><span data-if="python" style="display:none">image_fft</span></code></b> (output_object)  </span><span>image(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject *</span> (byte / direction / cyclic / int1 / int2 / uint2 / int4 / real / complex)</span>
</div>
<p class="pardesc">Fourier-transformed image.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Direction" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Direction</span><span data-if="c" style="display:none">Direction</span><span data-if="cpp" style="display:none">Direction</span><span data-if="com" style="display:none">Direction</span><span data-if="dotnet" style="display:none">direction</span><span data-if="python" style="display:none">direction</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Calculate forward or reverse transform.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'to_freq'</span>
    <span data-if="c" style="display:none">"to_freq"</span>
    <span data-if="cpp" style="display:none">"to_freq"</span>
    <span data-if="com" style="display:none">"to_freq"</span>
    <span data-if="dotnet" style="display:none">"to_freq"</span>
    <span data-if="python" style="display:none">"to_freq"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'from_freq'</span><span data-if="c" style="display:none">"from_freq"</span><span data-if="cpp" style="display:none">"from_freq"</span><span data-if="com" style="display:none">"from_freq"</span><span data-if="dotnet" style="display:none">"from_freq"</span><span data-if="python" style="display:none">"from_freq"</span>, <span data-if="hdevelop" style="display:inline">'to_freq'</span><span data-if="c" style="display:none">"to_freq"</span><span data-if="cpp" style="display:none">"to_freq"</span><span data-if="com" style="display:none">"to_freq"</span><span data-if="dotnet" style="display:none">"to_freq"</span><span data-if="python" style="display:none">"to_freq"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="Norm" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Norm</span><span data-if="c" style="display:none">Norm</span><span data-if="cpp" style="display:none">Norm</span><span data-if="com" style="display:none">Norm</span><span data-if="dotnet" style="display:none">norm</span><span data-if="python" style="display:none">norm</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Normalizing factor of the transform.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'sqrt'</span>
    <span data-if="c" style="display:none">"sqrt"</span>
    <span data-if="cpp" style="display:none">"sqrt"</span>
    <span data-if="com" style="display:none">"sqrt"</span>
    <span data-if="dotnet" style="display:none">"sqrt"</span>
    <span data-if="python" style="display:none">"sqrt"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'n'</span><span data-if="c" style="display:none">"n"</span><span data-if="cpp" style="display:none">"n"</span><span data-if="com" style="display:none">"n"</span><span data-if="dotnet" style="display:none">"n"</span><span data-if="python" style="display:none">"n"</span>, <span data-if="hdevelop" style="display:inline">'none'</span><span data-if="c" style="display:none">"none"</span><span data-if="cpp" style="display:none">"none"</span><span data-if="com" style="display:none">"none"</span><span data-if="dotnet" style="display:none">"none"</span><span data-if="python" style="display:none">"none"</span>, <span data-if="hdevelop" style="display:inline">'sqrt'</span><span data-if="c" style="display:none">"sqrt"</span><span data-if="cpp" style="display:none">"sqrt"</span><span data-if="com" style="display:none">"sqrt"</span><span data-if="dotnet" style="display:none">"sqrt"</span><span data-if="python" style="display:none">"sqrt"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="ResultType" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ResultType</span><span data-if="c" style="display:none">ResultType</span><span data-if="cpp" style="display:none">ResultType</span><span data-if="com" style="display:none">ResultType</span><span data-if="dotnet" style="display:none">resultType</span><span data-if="python" style="display:none">result_type</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Image type of the output image.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'complex'</span>
    <span data-if="c" style="display:none">"complex"</span>
    <span data-if="cpp" style="display:none">"complex"</span>
    <span data-if="com" style="display:none">"complex"</span>
    <span data-if="dotnet" style="display:none">"complex"</span>
    <span data-if="python" style="display:none">"complex"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'byte'</span><span data-if="c" style="display:none">"byte"</span><span data-if="cpp" style="display:none">"byte"</span><span data-if="com" style="display:none">"byte"</span><span data-if="dotnet" style="display:none">"byte"</span><span data-if="python" style="display:none">"byte"</span>, <span data-if="hdevelop" style="display:inline">'complex'</span><span data-if="c" style="display:none">"complex"</span><span data-if="cpp" style="display:none">"complex"</span><span data-if="com" style="display:none">"complex"</span><span data-if="dotnet" style="display:none">"complex"</span><span data-if="python" style="display:none">"complex"</span>, <span data-if="hdevelop" style="display:inline">'cyclic'</span><span data-if="c" style="display:none">"cyclic"</span><span data-if="cpp" style="display:none">"cyclic"</span><span data-if="com" style="display:none">"cyclic"</span><span data-if="dotnet" style="display:none">"cyclic"</span><span data-if="python" style="display:none">"cyclic"</span>, <span data-if="hdevelop" style="display:inline">'direction'</span><span data-if="c" style="display:none">"direction"</span><span data-if="cpp" style="display:none">"direction"</span><span data-if="com" style="display:none">"direction"</span><span data-if="dotnet" style="display:none">"direction"</span><span data-if="python" style="display:none">"direction"</span>, <span data-if="hdevelop" style="display:inline">'int1'</span><span data-if="c" style="display:none">"int1"</span><span data-if="cpp" style="display:none">"int1"</span><span data-if="com" style="display:none">"int1"</span><span data-if="dotnet" style="display:none">"int1"</span><span data-if="python" style="display:none">"int1"</span>, <span data-if="hdevelop" style="display:inline">'int2'</span><span data-if="c" style="display:none">"int2"</span><span data-if="cpp" style="display:none">"int2"</span><span data-if="com" style="display:none">"int2"</span><span data-if="dotnet" style="display:none">"int2"</span><span data-if="python" style="display:none">"int2"</span>, <span data-if="hdevelop" style="display:inline">'int4'</span><span data-if="c" style="display:none">"int4"</span><span data-if="cpp" style="display:none">"int4"</span><span data-if="com" style="display:none">"int4"</span><span data-if="dotnet" style="display:none">"int4"</span><span data-if="python" style="display:none">"int4"</span>, <span data-if="hdevelop" style="display:inline">'real'</span><span data-if="c" style="display:none">"real"</span><span data-if="cpp" style="display:none">"real"</span><span data-if="com" style="display:none">"real"</span><span data-if="dotnet" style="display:none">"real"</span><span data-if="python" style="display:none">"real"</span>, <span data-if="hdevelop" style="display:inline">'uint2'</span><span data-if="c" style="display:none">"uint2"</span><span data-if="cpp" style="display:none">"uint2"</span><span data-if="com" style="display:none">"uint2"</span><span data-if="dotnet" style="display:none">"uint2"</span><span data-if="python" style="display:none">"uint2"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="Width" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Width</span><span data-if="c" style="display:none">Width</span><span data-if="cpp" style="display:none">Width</span><span data-if="com" style="display:none">Width</span><span data-if="dotnet" style="display:none">width</span><span data-if="python" style="display:none">width</span></code></b> (input_control)  </span><span>integer <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">int</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Width of the image for which the runtime should be
optimized.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>512</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>128, 160, 192, 256, 320, 384, 512, 640, 768, 1024, 2048</p>
</div>
<h2 id="sec_result">结果</h2>
<p><code><span data-if="hdevelop" style="display:inline">rft_generic</span><span data-if="c" style="display:none">rft_generic</span><span data-if="cpp" style="display:none">RftGeneric</span><span data-if="com" style="display:none">RftGeneric</span><span data-if="dotnet" style="display:none">RftGeneric</span><span data-if="python" style="display:none">rft_generic</span></code> returns <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
     if all parameters are correct.  If
the input is empty the behavior can be set via
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system(::'no_object_result',&lt;Result&gt;:)</span><span data-if="c" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span><span data-if="cpp" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="com" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="python" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span></code></a>.  If necessary,
an exception is raised.</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="optimize_rft_speed.html"><span data-if="hdevelop" style="display:inline">optimize_rft_speed</span><span data-if="c" style="display:none">optimize_rft_speed</span><span data-if="cpp" style="display:none">OptimizeRftSpeed</span><span data-if="com" style="display:none">OptimizeRftSpeed</span><span data-if="dotnet" style="display:none">OptimizeRftSpeed</span><span data-if="python" style="display:none">optimize_rft_speed</span></a></code>, 
<code><a href="read_fft_optimization_data.html"><span data-if="hdevelop" style="display:inline">read_fft_optimization_data</span><span data-if="c" style="display:none">read_fft_optimization_data</span><span data-if="cpp" style="display:none">ReadFftOptimizationData</span><span data-if="com" style="display:none">ReadFftOptimizationData</span><span data-if="dotnet" style="display:none">ReadFftOptimizationData</span><span data-if="python" style="display:none">read_fft_optimization_data</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="convol_fft.html"><span data-if="hdevelop" style="display:inline">convol_fft</span><span data-if="c" style="display:none">convol_fft</span><span data-if="cpp" style="display:none">ConvolFft</span><span data-if="com" style="display:none">ConvolFft</span><span data-if="dotnet" style="display:none">ConvolFft</span><span data-if="python" style="display:none">convol_fft</span></a></code>, 
<code><a href="correlation_fft.html"><span data-if="hdevelop" style="display:inline">correlation_fft</span><span data-if="c" style="display:none">correlation_fft</span><span data-if="cpp" style="display:none">CorrelationFft</span><span data-if="com" style="display:none">CorrelationFft</span><span data-if="dotnet" style="display:none">CorrelationFft</span><span data-if="python" style="display:none">correlation_fft</span></a></code>, 
<code><a href="phase_correlation_fft.html"><span data-if="hdevelop" style="display:inline">phase_correlation_fft</span><span data-if="c" style="display:none">phase_correlation_fft</span><span data-if="cpp" style="display:none">PhaseCorrelationFft</span><span data-if="com" style="display:none">PhaseCorrelationFft</span><span data-if="dotnet" style="display:none">PhaseCorrelationFft</span><span data-if="python" style="display:none">phase_correlation_fft</span></a></code>, 
<code><a href="convert_image_type.html"><span data-if="hdevelop" style="display:inline">convert_image_type</span><span data-if="c" style="display:none">convert_image_type</span><span data-if="cpp" style="display:none">ConvertImageType</span><span data-if="com" style="display:none">ConvertImageType</span><span data-if="dotnet" style="display:none">ConvertImageType</span><span data-if="python" style="display:none">convert_image_type</span></a></code>, 
<code><a href="power_byte.html"><span data-if="hdevelop" style="display:inline">power_byte</span><span data-if="c" style="display:none">power_byte</span><span data-if="cpp" style="display:none">PowerByte</span><span data-if="com" style="display:none">PowerByte</span><span data-if="dotnet" style="display:none">PowerByte</span><span data-if="python" style="display:none">power_byte</span></a></code>, 
<code><a href="power_real.html"><span data-if="hdevelop" style="display:inline">power_real</span><span data-if="c" style="display:none">power_real</span><span data-if="cpp" style="display:none">PowerReal</span><span data-if="com" style="display:none">PowerReal</span><span data-if="dotnet" style="display:none">PowerReal</span><span data-if="python" style="display:none">power_real</span></a></code>, 
<code><a href="power_ln.html"><span data-if="hdevelop" style="display:inline">power_ln</span><span data-if="c" style="display:none">power_ln</span><span data-if="cpp" style="display:none">PowerLn</span><span data-if="com" style="display:none">PowerLn</span><span data-if="dotnet" style="display:none">PowerLn</span><span data-if="python" style="display:none">power_ln</span></a></code>, 
<code><a href="phase_deg.html"><span data-if="hdevelop" style="display:inline">phase_deg</span><span data-if="c" style="display:none">phase_deg</span><span data-if="cpp" style="display:none">PhaseDeg</span><span data-if="com" style="display:none">PhaseDeg</span><span data-if="dotnet" style="display:none">PhaseDeg</span><span data-if="python" style="display:none">phase_deg</span></a></code>, 
<code><a href="phase_rad.html"><span data-if="hdevelop" style="display:inline">phase_rad</span><span data-if="c" style="display:none">phase_rad</span><span data-if="cpp" style="display:none">PhaseRad</span><span data-if="com" style="display:none">PhaseRad</span><span data-if="dotnet" style="display:none">PhaseRad</span><span data-if="python" style="display:none">phase_rad</span></a></code>
</p>
<h2 id="sec_alternatives">可替代算子</h2>
<p>
<code><a href="fft_generic.html"><span data-if="hdevelop" style="display:inline">fft_generic</span><span data-if="c" style="display:none">fft_generic</span><span data-if="cpp" style="display:none">FftGeneric</span><span data-if="com" style="display:none">FftGeneric</span><span data-if="dotnet" style="display:none">FftGeneric</span><span data-if="python" style="display:none">fft_generic</span></a></code>, 
<code><a href="fft_image.html"><span data-if="hdevelop" style="display:inline">fft_image</span><span data-if="c" style="display:none">fft_image</span><span data-if="cpp" style="display:none">FftImage</span><span data-if="com" style="display:none">FftImage</span><span data-if="dotnet" style="display:none">FftImage</span><span data-if="python" style="display:none">fft_image</span></a></code>, 
<code><a href="fft_image_inv.html"><span data-if="hdevelop" style="display:inline">fft_image_inv</span><span data-if="c" style="display:none">fft_image_inv</span><span data-if="cpp" style="display:none">FftImageInv</span><span data-if="com" style="display:none">FftImageInv</span><span data-if="dotnet" style="display:none">FftImageInv</span><span data-if="python" style="display:none">fft_image_inv</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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